CN109679523A - 一种亲水性保护膜及其制备方法 - Google Patents

一种亲水性保护膜及其制备方法 Download PDF

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CN109679523A
CN109679523A CN201811495670.XA CN201811495670A CN109679523A CN 109679523 A CN109679523 A CN 109679523A CN 201811495670 A CN201811495670 A CN 201811495670A CN 109679523 A CN109679523 A CN 109679523A
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余正波
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Jiangxi Hao Ze Optical Film Technology Co Ltd
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Abstract

本发明公开了一种亲水性保护膜及其制备方法，其包括的结构：PET膜、压敏胶层A、亲水性防刮涂层、PET光学膜、压敏胶层B和PET离型膜，其中PET膜和压敏胶层A为保护层，使用层为亲水性防刮涂层、PET光学膜和压敏胶层B。引入的亲水性防刮涂层表面具有较低的水接触角和防刮性能。亲水性防刮涂层以丙烯酸、丙烯酸羟乙酯和聚乙二醇甲醚丙烯酸酯等为亲水单体，制备的光固化亲水性丙烯酸酯树脂，有良好的防刮性能又可显著降低树脂表面张力。

Description

一种亲水性保护膜及其制备方法
技术领域
本发明涉及新材料领域，更具体的说涉及一种亲水性保护膜及其制备方法。
背景技术
结雾和结水在我们生活中经常遇到。如寒冷的冬天或雨天在汽车的玻璃或后视镜上经凝结有水雾或水珠，影响驾驶员的视线和判断力，如果不及时擦干会影响行车安全。冬天里，在洗澡房内洗完澡后发现镜子总是模糊不清，甚至擦拭也无济于事。
解决结雾的方法有加热，中高档的汽车才会配置加热系统，因此这个方法成本高。另外还可以在玻璃或后视镜的表面做疏水处理，但经疏水处理的表面大水流过会形成水痕，小水珠则难以滚落。
现有技术也发现一些亲水的涂层材料，但其耐刮性和耐磨性较差，亲水性能保持不长，使用后涂层易脱落或黄变，使用寿命不长。
发明内容
本发明为了克服现有技术的不足，提供一种亲水性保护膜及其制备方法，以获得一款成本低、性能佳、使用使命长、环保的亲水性保护膜。本发明通过合成亲水性防刮硬化液的方法制备生产一种亲水性保护膜，该涂层表面具有较低的水接触角和防刮性能。
为实现以上目的，本发明采用如下的技术方案：
一种亲水性保护膜，其结构包括保护层、使用层和PET离型膜，其特征在于，所述保护层由PET膜和压敏胶层A构成，所述使用层由亲水性防刮涂层、PET光学膜和压敏胶层B构成。即其包括的结构依次为：PET膜、压敏胶层A、亲水性防刮涂层、PET光学膜、压敏胶层B和PET离型膜。
其中，所述的亲水性防刮涂层为自制亲水性丙烯酸树脂和亲水单体等原料聚合制备而成的亲水性硬化液。
本发明的另一方面，一种亲水性保护膜的制备方法，其包括以下步骤：
1)制备自制亲水性丙烯酸树脂；
2)制备亲水性硬化液；
3)在PET光学膜上一面涂布亲水性防刮涂层，经热干燥后UV光固化后备用；
4)在步骤3)得到的PET光学膜上另一面涂布压敏胶层B，固化后用PET离型膜的离型面贴合，用于保护压敏胶层B；
5)在一PET膜上涂布压敏胶层A，固化后用其涂布有压敏胶层A侧贴合步骤4)制得的半成品PET光学膜上亲水性防刮涂层面。
其中，所述步骤2)的亲水性硬化液的制备原料组成及比重为：
其中，所述步骤1)的自制亲水性丙烯酸树脂合成的制备原料组成及比重为：
在一个优选的实施方案中，所述步骤3)为采用微凹辊涂布的方法将亲水性硬化液涂布于PET光学膜的一面上，经过95℃、2min干燥固化后，使用UV光固化，UV光的曝光量为400-800mj/cm2，固化后干膜的厚度为2～8μm。
在一个优选的实施方案中，所述步骤4)的压敏胶层B设置于PET光学膜的另一面上，所述压敏胶层B厚度为10-50μm；所述压敏胶层B选自有机硅压敏胶或丙烯酸压敏胶或聚氨酯压敏胶中任一种。
在一个优选的实施方案中，所述PET光学膜为聚对苯二甲酸乙二醇酯薄膜，薄膜厚度为50-250μm，透光率大于90％，雾度小于2％。
在一个优选的实施方案中，所述步骤5)中的PET膜上涂布有压敏胶层A，在PET(聚对苯二甲酸乙二醇酯)膜上涂布压敏胶层A，所述PET膜厚度为36-75μm；所述压敏胶层A为有机硅压敏胶，厚度为8-15μm。
在一个优选的实施方案中，所述步骤4)的PET离型膜上有涂布离型涂层，PET离型膜厚度为36-75μm，离型涂层厚度为0.5-2μm。
在一个优选的实施方案中，所述的3-6官能单体选自三羟甲基丙烷三丙烯酸酯或季戊四醇三丙烯酸酯中的任一种或两种组合；所述亲水单体选自丙烯酸、丙烯酸羟乙酯或聚乙二醇单甲醚丙烯酸酯中的任一种或组合。
在一个优选的实施方案中，所述的含氟低聚物选自聚氧乙烯单全氟烷基醚、单官能团含氟聚氨酯丙烯酸酯或三官能团含氟聚氨酯丙烯酸酯中的任一种或组合。
与现有技术相比，本发明的有益效果是：
1)亲水性防刮涂层表面具有较低的水接触角和良好的防刮性能；
2)本发明可以低成本和环保的方法制备出一款性能佳、使用使命长的亲水性保护膜。
附图说明
图1是本发明亲水性保护膜的结构示意图。
其中，1为PET膜，2-压敏胶层A，3-亲水性防刮涂层，4-PET光学膜，5-压敏胶层B，6-PET离型膜。
具体实施方式
下面结合更具体的实施方式对本发明做进一步展开说明，但需要指出的是，本发明的一种亲水性保护膜及其制备方法并不限于这种特定的形式或步骤。对于本领域技术人员显然可以理解的是，以下的说明内容即使不做任何调整或修正，也可以直接适用于在此未指明的其他类似结构或制备方法。
如图1所示，本发明的一种亲水性保护膜，其包括的结构依次为：PET膜1、压敏胶层A2、亲水性防刮涂层3、PET光学膜4、压敏胶层B5和PET离型膜6。
实施例1
一种亲水性保护膜，其结构依次包括PET膜1、压敏胶层A2、亲水性防刮涂层3、PET光学膜4、压敏胶层B5和PET离型膜6。所述PET膜的厚度为36μm，所述压敏胶层A为有机硅压敏胶，厚度为8μm；亲水性防刮涂层干膜的厚度为2μm；PET光学膜为聚对苯二甲酸乙二醇酯薄膜，薄膜厚度为50μm，透光率大于90％，雾度小于2％；压敏胶层B厚度为10μm，所述压敏胶层B选自有机硅压敏胶；PET离型膜上有涂布离型涂层，PET离型膜厚度为36μm，离型涂层厚度为0.5μm。
实施例2
一种亲水性保护膜，其结构依次包括PET膜1、压敏胶层A2、亲水性防刮涂层3、PET光学膜4、压敏胶层B5和PET离型膜6。所述PET膜的厚度为48μm，所述压敏胶层A为有机硅压敏胶，厚度为10μm；亲水性防刮涂层干膜的厚度为4μm；PET光学膜为聚对苯二甲酸乙二醇酯薄膜，薄膜厚度为100μm，透光率大于90％，雾度小于2％；压敏胶层B厚度为25μm，所述压敏胶层B选自丙烯酸压敏胶；PET离型膜上有涂布离型涂层，PET离型膜厚度为48μm，离型涂层厚度为1μm。
实施例3
一种亲水性保护膜，其结构依次包括PET膜1、压敏胶层A2、亲水性防刮涂层3、PET光学膜4、压敏胶层B5和PET离型膜6。所述PET膜的厚度为62μm，所述压敏胶层A为有机硅压敏胶，厚度为12μm；亲水性防刮涂层干膜的厚度为6μm；PET光学膜为聚对苯二甲酸乙二醇酯薄膜，薄膜厚度为180μm，透光率大于90％，雾度小于2％；压敏胶层B厚度为40μm，所述压敏胶层B选自聚氨酯压敏胶；PET离型膜上有涂布离型涂层，PET离型膜厚度为59μm，离型涂层厚度为1.5μm。
实施例4
一种亲水性保护膜，其结构依次包括PET膜1、压敏胶层A2、亲水性防刮涂层3、PET光学膜4、压敏胶层B5和PET离型膜6。所述PET膜的厚度为75μm，所述压敏胶层A为有机硅压敏胶，厚度为15μm；亲水性防刮涂层干膜的厚度为8μm；PET光学膜为聚对苯二甲酸乙二醇酯薄膜，薄膜厚度为250μm，透光率大于90％，雾度小于2％；压敏胶层B厚度为50μm，所述压敏胶层B选自丙烯酸压敏胶；PET离型膜上有涂布离型涂层，PET离型膜厚度为75μm，离型涂层厚度为2μm。
实施例5
制备亲水性丙烯酸树脂：将3.5Kg丙烯酸羟乙酯，丙烯酸甲酯2.0Kg，甲基丙烯酸缩水甘油脂1.25Kg，含氟低聚物(聚氧乙烯单全氟烷基醚)0.015Kg，DDMAT0.2Kg，TPO0.03Kg，丁酮3.8Kg依次加入到在小型反应釜中搅拌，要求搅拌时反应釜排氧充氮气，并在遮光或黄光条件下混合。搅拌30min后将反应釜中的紫外灯(普通钠玻璃截去短波紫外辐射)打开，使用强度为I(365nm)＝100μW/cm3的长波紫外辐射作为活化源。聚合反应温度为25℃，聚合过程用氮气保护，反应3小时。反应得到的聚合产物密封保存，即可得到亲水性丙烯酸树脂。
实施例6
亲水性硬化液制备：称取10.0Kg自制亲水性丙烯酸树脂于搅拌桶中，分别加入丙烯酸酯化聚丙烯酸酯1.15Kg，6-9官能聚氨酯丙烯酸酯2.5Kg，3-6官能单体(三羟甲基丙烷三丙烯酸酯)1.0Kg，TPGDA 2.0Kg，亲水单体(聚乙二醇单甲醚丙烯酸酯)3.4Kg，1-羟基环己基苯甲酮1.3Kg，丙二醇甲醚(PM)12.5Kg，然后使用搅拌机，在避光暗室或黄光环境、20℃温度条件下充分搅拌30分钟，混合均匀得到亲水性硬化液，用黑色瓶子密封包装备用。
尽管上文对本发明的具体实施方式给予了详细描述和说明，但是应该指明的是，我们可以依据本发明的构想对上述实施方式进行各种等效改变和修改，其所产生的功能作用仍未超出说明书及附图所涵盖的精神时，均应在本发明的保护范围之内。

Claims (12)

1.一种亲水性保护膜，其结构包括保护层、使用层和PET离型膜，其特征在于，所述保护层由PET膜和压敏胶层A构成，所述使用层由亲水性防刮涂层、PET光学膜和压敏胶层B构成。
2.根据权利要求1所述的一种亲水性保护膜，其特征在于，所述的亲水性防刮涂层为自制亲水性丙烯酸树脂和亲水单体等原料聚合制备而成的亲水性硬化液。
3.权利要求1-2所述的一种亲水性保护膜的制备方法，其包括以下步骤：
1)制备自制亲水性丙烯酸树脂；
2)制备亲水性硬化液；
3)在PET光学膜上一面涂布亲水性防刮涂层，经热干燥后UV光固化后备用；
4)在步骤3)得到的PET光学膜上另一面涂布压敏胶层B，固化后用PET离型膜的离型面贴合，用于保护压敏胶层B；
5)在一PET膜上涂布压敏胶层A，固化后用其涂布有压敏胶层A侧贴合步骤4)制得的半成品PET光学膜上亲水性防刮涂层面。
4.根据权利要求3所述的一种亲水性保护膜的制备方法，其特征在于，所述步骤2)的亲水性硬化液的制备原料组成及比重为：
5.根据权利要求3所述的一种亲水性保护膜的制备方法，其特征在于，所述步骤1)的自制亲水性丙烯酸树脂合成的制备原料组成及比重为：
6.根据权利要求3所述的一种亲水性保护膜的制备方法，其特征在于，所述步骤3)为采用微凹辊涂布的方法将亲水性硬化液涂布于PET光学膜的一面上，经过95℃、2min干燥固化后，使用UV光固化，UV光的曝光量为400-800mj/cm2，固化后干膜的厚度为2～8μm。
7.根据权利要求3所述的一种亲水性保护膜的制备方法，其特征在于，所述步骤4)的压敏胶层B设置于PET光学膜的另一面上，所述压敏胶层B厚度为10-50μm；所述压敏胶层B选自有机硅压敏胶或丙烯酸压敏胶或聚氨酯压敏胶中任一种。
8.根据权利要求3所述的一种亲水性保护膜的制备方法，其特征在于，所述PET光学膜为聚对苯二甲酸乙二醇酯薄膜，薄膜厚度为50-250μm，透光率大于90％，雾度小于2％。
9.根据权利要求3所述的一种亲水性保护膜的制备方法，其特征在于，所述步骤5)中的PET膜上涂布有压敏胶层A，在PET膜上涂布压敏胶层A，所述PET膜厚度为36-75μm；所述压敏胶层A为有机硅压敏胶，厚度为8-15μm。
10.根据权利要求3所述的一种亲水性保护膜的制备方法，其特征在于，所述步骤4)的PET离型膜上有涂布离型涂层，PET离型膜厚度为36-75μm，离型涂层厚度为0.5-2μm。
11.根据权利要求4所述的一种亲水性保护膜的制备方法，其特征在于，所述的3-6官能单体选自三羟甲基丙烷三丙烯酸酯或季戊四醇三丙烯酸酯中的任一种或两种组合；所述亲水单体选自丙烯酸、丙烯酸羟乙酯或聚乙二醇单甲醚丙烯酸酯中的任一种或组合。
12.根据权利要求5所述的一种亲水性保护膜的制备方法，其特征在于，所述的含氟低聚物选自聚氧乙烯单全氟烷基醚、单官能团含氟聚氨酯丙烯酸酯或三官能团含氟聚氨酯丙烯酸酯中的任一种或组合。
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